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Approximate the mean of the frequency distribution for the populations (in thousands) of the counties in a certain state. Population (in thousands) Frequency 0-19 49

Approximate the mean of the frequency distribution for the populations (in thousands) of the counties in a certain state. Population (in thousands) Frequency 0-19 49 20-39 2 40-59 1 60-79 1 80-99 1 100-119 4 120-139 0 140-159 1

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